diff --git a/devices/common/patches/syncdial.patch b/devices/common/patches/syncdial.patch
index e717432..f363016 100644
--- a/devices/common/patches/syncdial.patch
+++ b/devices/common/patches/syncdial.patch
@@ -12,10 +12,43 @@
 
 --- a/package/network/services/ppp/files/ppp.sh
 +++ b/package/network/services/ppp/files/ppp.sh
-@@ -233,7 +233,15 @@ proto_pppoe_setup() {
+@@ -74,7 +74,7 @@ ppp_generic_init_config() {
+ 	proto_config_add_string pppd_options
+ 	proto_config_add_string 'connect:file'
+ 	proto_config_add_string 'disconnect:file'
+-	[ -e /proc/sys/net/ipv6 ] && proto_config_add_string ipv6
++	proto_config_add_string ipv6
+ 	proto_config_add_boolean authfail
+ 	proto_config_add_int mtu
+ 	proto_config_add_string pppname
+@@ -90,9 +90,7 @@ ppp_generic_setup() {
+ 	local config="$1"; shift
+ 	local localip
+ 
+-	json_get_vars ip6table demand keepalive keepalive_adaptive username password pppd_options pppname unnumbered persist maxfail holdoff peerdns sourcefilter delegate
+-
+-	[ ! -e /proc/sys/net/ipv6 ] && ipv6=0 || json_get_var ipv6 ipv6
++	json_get_vars ipv6 ip6table demand keepalive keepalive_adaptive username password pppd_options pppname unnumbered persist maxfail holdoff peerdns sourcefilter delegate
+ 
+ 	if [ "$ipv6" = 0 ]; then
+ 		ipv6=""
+@@ -157,9 +155,9 @@ ppp_generic_setup() {
+ 		${connect:+connect "$connect"} \
+ 		${disconnect:+disconnect "$disconnect"} \
+ 		ip-up-script /lib/netifd/ppp-up \
+-		${ipv6:+ipv6-up-script /lib/netifd/ppp6-up} \
++		ipv6-up-script /lib/netifd/ppp6-up \
+ 		ip-down-script /lib/netifd/ppp-down \
+-		${ipv6:+ipv6-down-script /lib/netifd/ppp-down} \
++		ipv6-down-script /lib/netifd/ppp-down \
+ 		${mtu:+mtu $mtu mru $mtu} \
+ 		"$@" $pppd_options
+ }
+@@ -237,7 +235,16 @@ proto_pppoe_setup() {
  	json_get_var padi_attempts padi_attempts
  	json_get_var padi_timeout padi_timeout
  
++#By 蝈蝈：并发拨号同步的前期准备
 +	syncppp_option=""
 +	[ "$(uci get syncdial.config.enabled)" -eq "1" ] && {
 +		ppp_if_cnt=$(uci show network | grep -c "\.proto=\'pppoe\'$")